13368733665257 has 4 divisors (see below), whose sum is σ = 13376801701716. Its totient is φ = 13360665628800.

The previous prime is 13368733665179. The next prime is 13368733665311. The reversal of 13368733665257 is 75256633786331.

13368733665257 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9616846018816 + 3751887646441 = 3101104^2 + 1936979^2 .

It is a cyclic number.

It is not a de Polignac number, because 13368733665257 - 2¹⁰ = 13368733664233 is a prime.

It is a super-2 number, since 2×13368733665257² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13368733665193 and 13368733665202.

It is not an unprimeable number, because it can be changed into a prime (13368733665557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4034015744 + ... + 4034019057.

It is an arithmetic number, because the mean of its divisors is an integer number (3344200425429).

Almost surely, 2^{13368733665257} is an apocalyptic number.

It is an amenable number.

13368733665257 is a deficient number, since it is larger than the sum of its proper divisors (8068036459).

13368733665257 is an equidigital number, since it uses as much as digits as its factorization.

13368733665257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8068036458.

The product of its digits is 342921600, while the sum is 65.

The spelling of 13368733665257 in words is "thirteen trillion, three hundred sixty-eight billion, seven hundred thirty-three million, six hundred sixty-five thousand, two hundred fifty-seven".